Hi Thanks for your quick reply.
I ran the above command. But still private bytes are not updating in the timeline by using 'Unused port' option.

Firstly i want to tell u that I am getting above mentioned error only if i use Original port option. that time private bytes are getting updated in timeline. But could not complete the snapshot since 'An unhandeled win32 exception occured in w3wp.exe' n above metioned error

But when I try to use "Unused port" that time Private bytes are not getting updated in timeline.

Actually i am able to profiling using 'unused port' option, but now I am getting error as "The snapshot failed because .NET did not report every referenced object... manually switch your application to the workstation garbage collector." while taking snapshot.

i have also done the changes for gcserver in the ASPnet.config file

Steps executed:
1. Start profiling with Unused port
2. Login to application and go to the testpage
3. Take snapshot [baseline - this is successfully done]
4. Start the process which we need to analyze for memory leakage
5. Take snashot after 10-15 mnts.

Above error get display. Process get stopped When I checked App pool i found that it been stopped.